Longitudinal Range-Gorge Region is peculiar for its high mountains and deep gorges,abundant bio-diversities,frangile eco-environment and so on.Road is the primary traffic means in this area and the expansion effects caused due to road construction are distinguishable from those of plain area.Based on the digital land-use maps of 1985 and 2000 and road maps obtained from Resources Data Center of CAS,selecting typical section of highways,the land-use changes of the Longitudinal Range-Gorge Region were analyzed using the software of ArcGIS 8.1 and through traditional statistical analyzing methods.The cases of the study are located in Jinghong and Baoshan cities including the urban areas and the road buffer zones with width of 1km,2km,5km and 20km along the roads.In the paper,land-use transfer matrix representing the changes of land-use structure,the index of land-use degree representing the land-use intensity and the index of expansion intensity were used as the reflection of the expansion effects of the road construction.The main conclusions are given as follows:①The transformation of land-use pattern in the study area showed that some forests have been converted to grassland and cultivated land,indicating that ecosystem has degraded.②Changes of land-use structure showed that forest and grassland dominated and the ecosystem was well preserved in the Longitudinal Range-Gorge Region,however,there were some artificial interference in the region.Land-use degree was determined by the local economic level and the land-use policies and the like.③The sequence according to the index of land-use extend is La20km>La5km>La2km>Laregion>La1km in Jinghong,and La1km>La2km>La5km>Laregion≈La20km in Baoshan.④There were expansion effects of the road construction in the Longitudinal Range-Gorge Region but the effects were inapparent both in expansion and in intensity comparing with those of the plain area.The expansion effects of road construction were restricted by local natural conditions and economic developing level.The scope was 1km to 5km along the road.